TWM538842U - Assistance element of feeder sleeve - Google Patents

Abstract

An assistance element of feeder sleeve including a first part and a second part is provided. The first part has a first end, a second end opposite to the first end and a first side wall connected between the first end and the second end. The first end of the first part is used to mount on a mold. The first side wall defines a first hole. The second part has a third end, a fourth end opposite to the third end and a second side wall connected between the third end and the fourth end. The third end of the second part is used to be connected with the second end of the first part. The second side wall defines a second hole. The second hole is used to be connected with the second hole. The fourth end of the second part is used to mount within the feeder sleeve so that the assistance element is positioned on the feeder sleeve.

Description

Riser insulation kit auxiliary component

The novel creation relates to a riser insulation sleeve auxiliary component, and in particular to a riser insulation sleeve auxiliary component for metal casting.

During the metal casting process, the molten metal is poured into the cavity of the mold model defining the shape of the casting. Shrinkage can cause unacceptable imperfections in the final casting due to shrinkage of the metal as it shrinks during solidification. This is a well-known problem in the foundry industry. The problem can be solved by using a riser sleeve auxiliary element that is mounted on the mold model during casting formation. The riser sleeve auxiliary element provides an additional volume in communication with the cavity such that the molten metal also enters the riser sleeve auxiliary component. During solidification of the metal, the molten metal in the riser sleeve auxiliary element will flow into the cavity to compensate for the shrinkage of the casting.

However, the existing riser sleeve auxiliary component needs to be fixed on the riser sleeve with an adhesive. However, during the casting process, the adhesive melts due to the high temperature environment and generates gas, which cannot be discharged and easily enters the casting. In the middle, the structural quality of the casting is not good.

The novel creation provides a riser insulation sleeve auxiliary element that contributes to metal casting.

The riser insulation sleeve auxiliary component of the novel creation comprises a first component and a second component. The first component has a first end, a second end opposite the first end, and a first side wall coupled between the first end and the second end. The first end of the first component is for mounting on a mold model. The first side wall defines a first aperture. The second component has a third end, a fourth end opposite the third end, and a second side wall connected between the third end and the fourth end. The third end of the second component is for connection with the second end of the first component. The second side wall defines a second aperture. The second hole is for communicating with the first hole. The fourth end of the second component is mounted in the riser sleeve to position the riser sleeve auxiliary component on the riser sleeve.

The riser insulation sleeve auxiliary element created by the novel comprises a stepped part and a ring part. The stepped member has a first end, a second end opposite the first end, and a stepped side wall connected between the first end and the second end. The first end is for mounting on a mold model. The annular member has a third end, a fourth end opposite the third end, and a second side wall connected between the third end and the fourth end. The second side wall defines a second aperture. The second hole is in communication with the first hole. The third end of the annular member engages with the first bore of the stepped member. The fourth end of the annular member is exposed outside of the stepped member. The fourth end of the annular member is mounted in the riser sleeve to position the riser sleeve auxiliary component on the riser sleeve.

In an embodiment of the present invention, the first side wall of the first component is a stepped side wall. The stepped sidewall has a plurality of first zone annular sidewalls and a plurality of second zone annular sidewalls. The inner diameter of the annular side wall of the first zone decreases from the second end to the first end. Any second zone annular side wall is connected between adjacent two first zone annular side walls.

In an embodiment of the present invention, any one of the first annular side walls is directly connected to the second annular side wall, and the first annular side wall and the second annular side wall are substantially at an angle. The upper is equal to 90 ^o .

In an embodiment of the present invention, each of the first region annular side walls and each of the second region annular side walls have an annular shape.

In an embodiment of the present invention, at least one of the first annular side wall and the second annular side wall has a plurality of through holes.

In an embodiment of the novel creation, the second component is an annular component. The third end of the annular member is nested with the first bore of the first member and the fourth end of the annular member is exposed outside of the first member.

In an embodiment of the present invention, the outer diameter of the third end of the second member is substantially equal to the inner diameter of the annular side wall of one of the first regions.

In an embodiment of the novel creation, the second component is welded to the first component.

In an embodiment of the present invention, the first side wall of the first component includes a first annular side wall having a first end and a second annular side wall having a second end, and the first side annular side wall It is inclined with respect to the annular side wall of the second zone.

In an embodiment of the present invention, the annular side wall of the first zone and the annular side wall of the second zone have an obtuse angle.

In an embodiment of the present invention, the inner diameter of the first annular side wall is tapered as it approaches the first end, and the second side annular side wall has a uniform inner diameter.

In an embodiment of the novel creation, the second component is an annular component. The second annular side wall of the first component is nested with the second aperture of the second component, and the first annular side wall of the first component is exposed outside of the second component.

In an embodiment of the present invention, the inner diameter of the second member is substantially equal to the outer diameter of the annular side wall of the second portion of the first member.

In an embodiment of the novel creation, the second component is an annular member.

In an embodiment of the present invention, the annular member is an annular member.

Based on the above, the riser sleeve auxiliary component of the present invention includes a first component and a second component. In particular, the fourth end of the second component is mounted in the riser sleeve to position the riser sleeve auxiliary component on the riser sleeve. The feeder insulation element is well positioned on the riser sleeve to aid in metal casting.

The above described features and advantages of the present invention will become more apparent and understood from the following description.

1 shows a cross section of a riser sleeve auxiliary component of an embodiment of the present invention. 2 is a side elevational view of the riser insulation sleeve auxiliary component of the present invention. FIG. 3 is a top plan view of an auxiliary component of a riser sleeve according to an embodiment of the present invention. Referring to FIG. 1 , FIG. 2 and FIG. 3 , the riser sleeve auxiliary component 100 includes a first component 110 and a second component 120 . The first component 110 has a first end 112, a second end 114 opposite the first end 112, and a first sidewall 116 connected between the first end 112 and the second end 114. As shown in FIG. 1, the first end 112 of the first component 110 is for mounting on the mold model 10. When the first end 112 is mounted on the mold model 10, the second end 114 of the first component 110 is exposed outside of the mold model 10. The first side wall 116 of the first component 110 defines a first aperture 110a. Molten metal may be injected into the mold mold 10 via the first hole 110a of the first component 110. During the metal casting process, the first component 110 is pressed to deform the first sidewall 116 (eg, the angle α becomes smaller) to squeeze the molten metal in the first hole 110a into the mold model 10, In turn, the chance of the shrinkage of the casting is reduced.

4 is a side elevational view of the first component of the riser sleeve auxiliary component of the present invention. Referring to FIG. 1 , FIG. 2 and FIG. 4 , in the embodiment, the first component 110 can be a stepped component. The first side wall 116 of the first component 110 can be a stepped side wall. The stepped side wall has a plurality of first area annular side walls 116a and a plurality of second area annular side walls 116b alternately arranged. The inner diameter d of the first annular side wall 116a is diminished from the second end 114 toward the first end 112. Any second zone annular sidewall 116b is coupled between adjacent two first zone annular sidewalls 116a. As shown in FIG. 1, in the present embodiment, the first annular side wall 116a may be parallel to the hole axis X1 of the first hole 110a, and the second annular side wall 116b may be perpendicular to the hole axis X1 of the first hole 110a. . In other words, a first zone annular sidewall 116a is directly coupled to a second zone annular sidewall 116b, and the angle a between the first zone annular sidewall 116a and the second zone annular sidewall 116b can be substantially equal to 90 ^o . However, the novel creation is not limited thereto. In other embodiments, the angle α between the first annular side wall 116a and the second annular side wall 116b may be other suitable angles, for example, greater than 90 ^o . In this embodiment, each of the first annular side walls 116a and each of the second annular side walls 116a may have an annular shape. However, the novel creation is not limited thereto. In other embodiments, the first annular side wall 116a and the second annular side wall 116b may be designed to other suitable shapes according to actual needs.

In this embodiment, the first component 110 can be formed from a steel sheet. In other words, the first zone annular side wall 116a and the second zone annular side wall 116b may be integrally formed, and the thickness T1 of the first zone annular side wall 116a and the thickness T2 of the second zone annular side wall 116b may be equal. However, the novel creation is not limited thereto. In other embodiments, the first component 110 may be fabricated by using other materials and/or other methods. The first annular side wall 116a and the second annular side wall 116b are not necessarily integrated. The thickness T1 of the first annular side wall 116a and the thickness T2 of the second side annular side wall 116b are not necessarily equal. In this embodiment, most of the first annular side walls 116a have the same height H12, and a first annular side wall 116a closest to the first end 112 can have a higher height H11. The first end 112 of a component 110 is mounted on the mold model 10, but the novel creation is not limited thereto.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , the second component 120 has a third end 122 , a fourth end 124 opposite to the third end 122 , and a second sidewall connected between the third end 122 and the fourth end 124 . 126. The third end 122 of the second component 120 is for connection with the second end 114 of the first component 110. The second side wall 126 defines a second aperture 120a. The second hole 120a is for communicating with the first hole 110a. The molten metal may be injected into the mold model 10 via the communicated first hole 110a and the second hole 120a. When the third end 122 of the second component 120 is coupled to the second end 114 of the first component 110, the fourth end 124 of the second component 120 is exposed outside of the first component 110. In particular, the fourth end 124 of the second component 120 is mounted in the riser sleeve 20 while being abutted between the interior of the riser sleeve 20 and the riser sleeve auxiliary component 100 by the pin 30. The riser sleeve auxiliary component 100 is positioned on the riser sleeve 20. The riser sleeve auxiliary component 100 is well positioned on the riser sleeve 20 to aid in metal casting.

In the present embodiment, the second component 120 can be an annular component. The hole axis X2 of the second hole 120a of the second member 120 may be in line with the hole axis X1 of the first hole 110a of the first member 110. The second side wall 126 of the second component 120 can be parallel to the bore axis X2. For example, the second component 120 can be an annular component with uniform inner and outer diameters, but the novel creation is not limited thereto. The first component 110 can be nested with the third end 122 of the second component 120 such that the third end 122 of the second component 120 is coupled to the second end 114 of the first component 110. In particular, the inner side of a first annular side wall 116a adjacent the second end 114 can fit over the outer side of the third end 122 of the second member 120 to engage the first member 110 with the second member 120. At this time, the outer diameter D of the third end 122 of the second member 120 may be substantially equal to the inner diameter d of the first annular side wall 116a. In the present embodiment, in order to connect the first component 110 and the second component 120 more securely, a portion of the second side wall 126 and a first annular side wall 116a adjacent to the second end 114 may be welded together. However, the novel creation is not limited thereto. In other embodiments, the first component 110 and the second component 120 may also be fixed by other means. It is worth mentioning that the riser sleeve auxiliary component 100 of the present embodiment enables the first component 110 to be fixed to the riser via the second component 120 by the combination of the first component 110 and the second component 120. Since the sleeve 20 is provided, it is not necessary to use the adhesive as a fixing means as described above, so that the possibility that the adhesive generates gas due to melting at a high temperature is reduced, and thus the structural quality of the casting is effectively improved.

Referring to FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , in the embodiment, the first region annular sidewall 116 a and the second region annular sidewall 116 b of the first component 110 may not have a penetration hole. However, the novel creation is not limited thereto, and in other embodiments, at least one of the first region annular side wall 116a and the second region annular side wall 116b may also have a penetration hole. The following description is made with reference to FIGS. 5, 6, and 7.

Figure 5 is a side elevational view of the first component of the riser sleeve auxiliary component of another embodiment of the present invention. The first component 110A of FIG. 5 is similar to the aforementioned first component 110, and thus the same or corresponding configurations are denoted by the same or corresponding reference numerals. The difference between the two is that the second annular side wall 116b of the first component 110A can have a plurality of penetration holes h. Further, the plurality of penetration holes h may be randomly distributed on the plurality of second-region annular side walls 116b, but the novel creation is not limited thereto. In the embodiment of FIG. 5, the first annular side wall 116a of the first component 110A may have no through holes. However, the novel creation is not limited thereto. In other embodiments, the first annular side wall 116a of the first component 110A may also selectively have a through hole.

Figure 6 is a side elevational view of the first component of the riser sleeve auxiliary component of yet another embodiment of the present invention. The first component 110B of FIG. 6 is similar to the aforementioned first component 110, and thus the same or corresponding configurations are denoted by the same or corresponding reference numerals. The difference between the two is that the second annular side wall 116b of the first component 110B can have a plurality of penetration holes h. Furthermore, the orthographic projection of the plurality of penetration holes h on the reference plane (for example, the plane on which the second end 114 is located) may be radially distributed around the aperture axis X1 of the first aperture 110a. In the embodiment of FIG. 6, the first annular side wall 116a of the first component 110B may have no through holes. However, the novel creation is not limited thereto. In other embodiments, the first annular side wall 116a of the first component 110B may also selectively have a penetration hole.

Figure 7 is a side elevational view of the first component of the riser sleeve auxiliary component of the present invention. The first component 110C of FIG. 7 is similar to the aforementioned first component 110, and thus the same or corresponding configurations are denoted by the same or corresponding reference numerals. The difference between the two is that the first annular side wall 116a of the first component 110C can have a plurality of penetration holes h. In the embodiment of FIG. 7, the second annular side wall 116b of the first component 110C may have no through holes. However, the novel creation is not limited thereto. In other embodiments, the second annular side wall 116b of the first component 110C may also selectively have a penetration hole. The first component 110A, the first component 110B or the first component 110C described above may be coupled to the aforementioned second component 120 to form a riser sleeve auxiliary component. The riser sleeve auxiliary component is also within the scope of the novel creation.

Fig. 8 is a cross-sectional view showing the riser sleeve auxiliary member of the embodiment of the present invention. Fig. 9 is a side elevational view showing the auxiliary component of the riser sleeve of the present invention. Figure 10 is a side elevational view of the first component of the riser sleeve auxiliary component of the present invention. Figure 11 is a side elevational view of the second component of the riser sleeve auxiliary component of the present invention. Referring to FIGS. 8 and 9 , the riser sleeve auxiliary component 200 includes a first component 210 and a second component 220 . The first component 210 has a first end 212, a second end 214 opposite the first end 212, and a first sidewall 216 connected between the first end 212 and the second end 214. As shown in FIG. 8, the first end 212 of the first component 210 is for mounting on the mold model 10. When the first end 212 of the first component 210 is mounted on the mold model 10, the second end 214 of the first component 210 is exposed outside of the mold model 10. The first side wall 216 of the first component 210 defines a first aperture 210a. Molten metal may be injected into the mold mold 10 via the first hole 210a of the first component 210. During the metal casting process, the first component 210 is pressed to deform the first sidewall 216 (eg, the angle β becomes smaller) to squeeze the molten metal in the first hole 210a into the mold model 10, In turn, the chance of the shrinkage of the casting is reduced.

Referring to FIG. 8 , FIG. 9 and FIG. 10 , in the present embodiment, the first sidewall 216 of the first component 210 includes a first region annular sidewall 216 a having a first end 212 and a second region having a second end 214 . Annular side wall 216b. The first zone annular side wall 216a is inclined relative to the second zone annular side wall 216b. In detail, in the present embodiment, the second region annular side wall 216b may be parallel to the hole axis X1 of the first hole 210a, and the first region annular side wall 216a may be inclined with respect to the hole axis X1 of the first hole 210a. Furthermore, the first zone annular side wall 216a and the second zone annular side wall 216b have an angle β. The angle β may be an obtuse angle before the metal casting is performed without using the riser sleeve auxiliary component 200, but the novel creation is not limited thereto.

In the present embodiment, the inner diameter d1 of the first annular side wall 216a may taper as it approaches the first end 212, while the second annular side wall 216b may have a uniform inner diameter d2. In other words, the first zone annular side wall 216a approximates the side of one cone and the second zone annular side wall 216b approximates the side of a cylinder. In the present embodiment, the first member 210 may be formed by pressing a steel sheet. The first zone annular side wall 216a and the second zone annular side wall 216b may be integrally formed. The thickness T1 of the first zone annular sidewall 216a and the thickness T2 of the second zone annular sidewall 216b may be substantially equal. However, the novel creation is not limited thereto. In other embodiments, the first component 210 may be fabricated by using other materials and/or other methods. The first annular side wall 216a and the second annular side wall 216b are not necessarily integrated. The thickness T1 of the first annular side wall 216a and the thickness T2 of the second side annular side wall 216b are not necessarily equal.

Referring to FIGS. 8 , 9 and 110 , the second component 220 has a third end 222 , a fourth end 224 opposite to the third end 222 , and a second sidewall connected between the third end 222 and the fourth end 224 . 226. The third end 222 of the second component 220 is for connection with the second end 214 of the first component 210. The second side wall 226 defines a second aperture 220a. The second hole 220a is for communicating with the first hole 210a. The molten metal may be injected into the mold model 10 via the communicated first hole 210a and the second hole 220a. The fourth end 224 of the second component 220 is mounted within the riser sleeve 20 to position the riser sleeve accessory component 200 on the riser sleeve 20. The riser sleeve auxiliary component 200 is well positioned on the riser sleeve 20 to aid in metal casting.

In the present embodiment, the second component 220 can be an annular component. The hole axis X2 of the second hole 220a and the hole axis X1 of the first hole 210a may be on the same straight line. The second side wall 226 of the second member 220 can be parallel to the bore axis X2 of the second bore 220a. For example, the second component 220 can be an annular component with uniform inner and outer diameters, but the novel creation is not limited thereto. The second annular side wall 216b of the first component 210 fits over the second aperture 220a of the second component 220. The outer side of the second annular side wall 216b of the first member 210 is engaged with the inner side of the second side wall 226 of the second member 220. At this time, the inner diameter d3 of the second member 220 is substantially equal to the outer diameter D1 of the second annular side wall 216b of the first member 210. Accordingly, the first member 210 can be frictionally moved inside the second member 220 to achieve a cushioning effect to prevent the riser sleeve 20 from being broken due to excessive impact force during assembly into the riser of the mold model 10. Moreover, the second side wall 226 of the riser sleeve 20 has a tapered profile to allow the second component 220 to be engaged with the riser sleeve 20 due to dimensional differences, and in another embodiment not shown, The second component can also be bonded to the second side wall of the riser sleeve.

The first annular side wall 216a of the first component 210 is exposed outside of the second component 220 to facilitate mounting on the mold model 10. In the present embodiment, the second member 220 may be fabricated using an iron sheet, but the novel creation is not limited thereto, and in other embodiments, the second member 220 may be fabricated using other suitable materials.

In summary, the riser insulation sleeve auxiliary component of the present invention includes a first component and a second component. The first component has a first end, a second end opposite the first end, and a first side wall coupled between the first end and the second end. The first end is for mounting on a mold model. The first side wall defines a first aperture. The second component has a third end, a fourth end opposite the third end, and a second side wall connected between the third end and the fourth end. The third end of the second component is for connection with the second end of the first component. The second side wall defines a second aperture. The second hole is for communicating with the first hole. In particular, the fourth end of the second component is mounted in the riser sleeve to position the riser sleeve auxiliary component on the riser sleeve. The feeder insulation element is well positioned on the riser sleeve to aid in metal casting.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the novel creation, and any person skilled in the art can make some changes without departing from the spirit and scope of the novel creation. Retouching, the scope of protection of this new creation is subject to the definition of the scope of the patent application attached.

10‧‧‧Mold model
20‧‧‧ riser insulation
30‧‧‧ pin
100‧‧‧Riser insulation kit auxiliary components
110, 110A, 110B, 110C, 210‧‧‧ first part
110a, 210a‧‧‧ first hole
112, 212‧‧‧ first end
114, 214‧‧‧ second end
116, 216‧‧‧ first side wall
116a, 216a‧‧‧ first zone annular side wall
116b, 216b‧‧‧ second zone annular side wall
120, 220‧‧‧ second part
120a, 220a‧‧‧ second hole
122, 222‧‧‧ third end
124, 224‧‧‧ fourth end
126, 226‧‧‧ second side wall
d, d1, d2, d3‧‧‧ inner diameter
D, D1‧‧‧ OD
H11, H12‧‧‧ height
H‧‧‧through hole
T1, T2‧‧‧ thickness
X1, X2‧‧‧ hole axis α, β‧‧‧ angle

1 shows a cross section of a riser sleeve auxiliary component of an embodiment of the present invention. 2 is a side elevational view of the riser insulation sleeve auxiliary component of the present invention. FIG. 3 is a top plan view of an auxiliary component of a riser sleeve according to an embodiment of the present invention. 4 is a side elevational view of the first component of the riser sleeve auxiliary component of the present invention. Figure 5 is a side elevational view of the first component of the riser sleeve auxiliary component of another embodiment of the present invention. Figure 6 is a side elevational view of the first component of the riser sleeve auxiliary component of yet another embodiment of the present invention. Figure 7 is a side elevational view of the first component of the riser sleeve auxiliary component of the present invention. Fig. 8 is a cross-sectional view showing the riser sleeve auxiliary member of the embodiment of the present invention. Fig. 9 is a side elevational view showing the auxiliary component of the riser sleeve of the present invention. Figure 10 is a side elevational view of the first component of the riser sleeve auxiliary component of the present invention. Figure 11 is a side elevational view of the second component of the riser sleeve auxiliary component of the present invention.

10‧‧‧Mold model

20‧‧‧ riser insulation

30‧‧‧ pin

100‧‧‧Riser insulation kit auxiliary components

110‧‧‧ first part

110a‧‧‧ first hole

112‧‧‧ first end

114‧‧‧second end

116‧‧‧First side wall

116a‧‧‧The first zone annular side wall

116b‧‧‧Round section of the second zone

120‧‧‧ second part

120a‧‧‧second hole

122‧‧‧ third end

124‧‧‧ fourth end

126‧‧‧ second side wall

d‧‧‧Inner diameter

D‧‧‧OD

H11, H12‧‧‧ height

T1, T2‧‧‧ thickness

X1, X2‧‧‧ hole axis

‧‧‧‧ angle

Claims (10)

A riser sleeve auxiliary component comprising: a first member having a first end, a second end opposite the first end, and a first side wall connected between the first end and the second end The first end is mounted on a mold model, the first side wall defines a first hole, and the second part has a third end, a fourth end opposite to the third end, and is coupled to the a second side wall between the third end and the fourth end, the third end of the second component is connected to the second end of the first component, and the second sidewall defines a second hole, The second hole is configured to communicate with the first hole, and the fourth end of the second component is mounted in a riser sleeve to position the riser sleeve auxiliary component on the riser sleeve. The riser insulation sleeve auxiliary component of claim 1, wherein the first side wall of the first component is a stepped sidewall, the stepped sidewall has a plurality of first annular sidewalls and a plurality of a two-zone annular sidewall, wherein the inner diameter of the first-region annular sidewall is decreased from the second end toward the first end, and any second-region annular sidewall is connected to the adjacent two first-region annular sidewalls between. The riser insulation sleeve auxiliary component of claim 2, wherein at least one of the first zone annular sidewall and the second zone annular sidewall has a plurality of penetration holes. The riser insulation sleeve auxiliary component of claim 1, wherein the second component is an annular component, and the third end of the annular component is nested with the first hole of the first component And the fourth end of the annular member is exposed outside the first member. The riser insulation sleeve auxiliary component of claim 4, wherein the first side wall of the first component is a stepped sidewall, the stepped sidewall has a plurality of first zone annular sidewalls and a plurality of a two-zone annular sidewall, wherein the inner diameter of the first-region annular sidewall is decreased from the second end toward the first end, and any second-region annular sidewall is connected to the adjacent two first-region annular sidewalls And the outer diameter of the third end of the second member is substantially equal to the inner diameter of the annular side wall of one of the first regions. The riser sleeve auxiliary component of claim 1, wherein the second component is welded to the first component. The riser insulation sleeve auxiliary component of claim 1, wherein the first side wall of the first component comprises a first annular side wall having the first end and a second side having the second end The annular side wall of the region is inclined with respect to the annular side wall of the second region. The riser insulation sleeve auxiliary component of claim 7, wherein an inner diameter of the annular side wall of the first zone is tapered toward the first end, and the annular side wall of the second zone has a uniform the inside diameter of. The riser sleeve auxiliary component of claim 7, wherein the second component is an annular member, the second annular side wall of the first component and the second hole of the second component The sleeve is closed while the first region annular side wall of the first component is exposed outside the second component. A riser sleeve auxiliary component comprising: a stepped member having a first end, a second end opposite the first end, and a stepped side wall connected between the first end and the second end The stepped side wall has a plurality of first annular side walls and a plurality of second annular side walls, wherein the inner diameter of the first annular side walls is decreased from the second end to the first end, either a two-zone annular side wall connected between adjacent two first-region annular side walls, the first end for mounting on a mold model; and an annular member having a third end opposite to the first a fourth end of the three ends and a second side wall connected between the third end and the fourth end, the second side wall defines a second hole, the second hole is in communication with the first hole, the ring The third end of the component is engaged with the first hole of the stepped component, the fourth end of the annular component is exposed outside the stepped component, and the fourth end of the annular component is used for mounting The riser sleeve is positioned to position the riser sleeve auxiliary component on the riser sleeve.